Diagnosis instructions

The state of charge of the emergency battery can be read via the control unit functions and the procedure for telecommunications. If the emergency battery needs to be replaced, a fault memory is stored. The diagnosis of the USB connection between Telematic Communication Box (TCB) basic version and head unit is integrated into the diagnosis of the head unit.

Function structure > 03 Body > Audio mode, Video mode, Navigation, Telephone > Head unit > Devices connected to head unit